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Originally Posted by John V
Well, rev matching and double-clutching are two completely different techniques. Rev-matching is, as you say, crucial to smooth and fast driving. But rev matching isn't about keeping the engine in the "sweet spot." Rev matching is only done to reduce the load on the clutch when shifting to a lower gear - think using your clutch to engage 2nd gear at highway speeds with the engine at idle. Would you rather use the clutch friction to increase the engine speed or use the throttle? I think you'd rather use the throttle, and that's rev-matching.
Double-clutching, in a synchro box, will just slow down your shifts and is a waste of time and energy.
I do know a thing or two about autocross as I do about 20 events a year including multiple National Tours / ProSolos and the Solo Nationals. I've only downshifted once in the past three years!
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Hi,
Yes, of course you're right, double-clutching and rev-matching are two different things. I guess my post was more to encourage people to match their revs than to double-clutch anyway. But by double-clutching, you master that technique of stabbing the throttle and matching the revs, as the Lister said, without even thinking about it...
Happy Motoring!... Jim'99